Koprecipitacijska sinteza La1-xSrxMnO3 (x = 0 - 0,5)

master's thesis

• Title (english): Coprecipitation synthesis of La1-xSrxMnO3 (x = 0 - 0.5)
• Author: Domagoj Rebernjak
• Mentor: Jelena Macan (mentor)
• Committee member: Jelena Macan (predsjednik povjerenstva)
• Committee member: Juraj Šipušić (član povjerenstva)
• Committee member: Antonia Ressler (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2021-09-30, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Basic Technical Sciences

Abstract

Cilj ovog rada bio je pripremiti stroncijem dopirane lantanove manganite (LSMO) s različitim udjelima stroncija (x = 0, 0,1, 0,2, 0,3, 0,5) postupkom koprecipitacije. Nastanak manganitnih faza ispitan je tehnikom rendgenske difrakcije (XRD) i infracrvenom spektroskopijom s Fourierovim transformacijama (FTIR). Nadalje, ispitana je primjena pripremljenih LSMO uzoraka kao fotokatalizatora u reakciji obezbojenja otopine metil oranža. Tijekom ispitivanja utvrđeno je da se obezbojenje uspješno odvija i u mraku te da je dominantni mehanizam obezbojenja zapravo adsorpcija. Učinkovitost adsorpcije metil oranža na pripremljenim LSMO uzorcima raste s porastom udjela Sr.

Abstract (english)

The aim of this study was to prepare strontium doped lanthanum manganites (LSMO) with different Sr amounts (x = 0, 0.1, 0.2, 0.3, 0.5) using the coprecipitation synthesis method. The manganite phases formation was investigated by the X-ray diffraction analysis (XRD) and Fourier transform infrared spectroscopy (FTIR). Furthermore, the application of prepared LSMO samples as photocatalysts on the decoloration of methyl orange solution was investigated. During the experiment, it was established that decoloration has successfully occurred in the dark and that the adsorption is the dominant decoloration mechanism. The efficiency of methyl orange adsorption on LSMO samples increased with the increasing Sr content.

• Keywords: adsorpcija; fotokataliza; koprecipitacija; stroncijem dopirani lantanovi manganiti (LSMO)
• Keywords (english): adsorption; coprecipitation; photocatalysis; strontium doped lanthanum manganites (LSMO)
• Language: croatian
• URN:NBN: urn:nbn:hr:149:274577
• Project: Number: IP-2018-01-5246; Title: Nanokompoziti s perovskitima za fotovoltaike, fotokatalizu i senzoriku; Acronym: NanoPeroPhotoSens; Leader: Andreja Gajović; Jurisdiction: Croatia; Funder: HRZZ; Funding stream: IP
• Study programme: Title: Materials Science and Engineering - Graduate study; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka kemijskog inženjerstva (magistar/magistra inženjer/inženjerka kemijskog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2023-04-21 10:57:36